The given photomicrograph
shows the transverse section of two blood vessels, X and Y connecting the heart and the lungs.
Identify the blood vessels and select the incorrect statement regarding them.
A Blood vessel X connects right ventricle of heart with lungs.
B Blood vessel Y connects lungs with left atrium of heart.
C Blood in X contains higher percentage of oxygen as compared to blood in Y.
D X is pulmonary artery that carries deoxygenated blood from heart to lungs whereas Y is pulmonary vein that carries oxygenated blood from lungs to heart.
The given graph shows
net uptake and net release of oxygen by a
plant kept in open over a 24 hour period.
Which of the following holds true regarding the given graph?
A At 0800 hour, the oxygen taken up by plant in respiration is equal to oxygen released by it during photosynthesis.
B Plant is respiring throughout the 24 hour period but it is photosynthesising only between 0600 hours to 1800 hours.
C Assuming that the plant has the same respiration rate throughout 24 hour period, 70 mg of oxygen is produced by plant at 1600 hour.
D The highest rate of photosynthesis occurs at 1200 hour.
Rahul took a turmeric paper and tried to draw flowers
on it with the help of cotton buds dipped in solutions
P and Q. The flower drawn with solution P was not
visible while the one drawn with solution Q. turned red.
Solutions P and Q. could be respectively
A Lime water and lemon juice
B Vinegar and soap solution
C Common salt solution and baking soda
D Both B and C.
Which of the following statements are incorrect?
I. Decomposition reactions are generally carried out by heating or by passing electricity.
II. An oxidising agent removes hydrogen from other substance.
III. In precipitation reactions, two substances react in solid state to form a soluble product.
IV. Precipitation and neutralisation reactions are examples of single displacement reaction.
A I and III only
B III and IV only
C II and IV only
D All of these.
The lengths of the mercury thread in a thermometer immersed in pure melting ice and in pure boiling water are 6 cm and 22 cm respectively. What is the temperature of a solution if the length of mercury thread is 14 cm in the solution?
A 50 K
B 273 K
C 323 K
D 373 K
Refer to the given table.
Select the option that correctly identifies P, Q and R.
|A||Beriberi||Vitamin C||Night blindness|
|C||Pellagra||Vitamin D||Night blindness|
|D||Beri beri||Vitamin D||Night blindness|
Answer is wrong
Refer to the given conversation about simple machines. Identify the INCORRECT option regarding P, Q and R.
A Q can be used to hold things.
B P can be axe or knife.
C R can be a ramp in hospitals.
D Q helps to move heavy objects.
Ruminant stomach is divided into four compartments. Select the correctly matched option.
AOmasum - Food is broken down into smaller pieces and water is absorbed.
BRumen - Fourth chamber and is the true stomach.
CAbomasum - Largest chamber and receives half chewed food from mouth.
DReticulum - Receives half digested food and sends it back to mouth as cud.